CN204044001U - Antifatigue shearing performance test device between a kind of bituminous pavement tack coat - Google Patents
Antifatigue shearing performance test device between a kind of bituminous pavement tack coat Download PDFInfo
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- CN204044001U CN204044001U CN201320793201.2U CN201320793201U CN204044001U CN 204044001 U CN204044001 U CN 204044001U CN 201320793201 U CN201320793201 U CN 201320793201U CN 204044001 U CN204044001 U CN 204044001U
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Abstract
The utility model discloses antifatigue shearing performance test device between a kind of bituminous pavement tack coat, comprise: environmental cabinet, and the tensile loads system be arranged in environmental cabinet, tensile loads system comprises the pedestal be fixedly installed on bottom environmental cabinet, and tensile loads axle, pedestal is provided with the first fixture, the output terminal of tensile loads axle is connected with the second fixture, first fixture is connected with on the first pull bar second fixture and is connected with the second pull bar, first pull bar and the second pull bar pass the center of test specimen to be measured, test specimen to be measured is provided with Light deformation measuring instrument, can be used in evaluating the type of bonding layer material and the impact of consumption antifatigue cutting performance thereof, make, for choose reasonable tack coat, there is directive significance, further, in the utility model, device also has structure simply, easy to operate feature.
Description
Technical field
The utility model relates to highway engineering field, particularly relates to antifatigue shearing performance test device between a kind of bituminous pavement tack coat.
Background technology
The good bituminous pavement interlayer bonding of working condition can ensure the globality of road surface layered system, and then effectively vehicular load is delivered to roadbed from road table and is come by load assignment, thus reduces pavement damage.On the contrary, occur peeling off once road surface loses interlaminar bonding, will interlayer slip be caused, and reduce anti-shear ability between supercrust, and then reduce road surface and transmit vehicular load ability, finally cause the appearance of pavement disease (as crack, rut, pass, gather around bag, cheat groove etc.).For a long time, interfacial shear slip is relate to a less aspect in the research of China road surface always, and this is relevant with the totally continuous hypothesis of each interlayer in China bituminous pavement design.In engineering practice, interlayer contact is generally in completely continuously and completely between slip, if interlayer Disposal Measures is improper, is easy to the weak link becoming pavement structure, under the adverse condition such as heavy duty, high temperature, abrupt slope, easily inter-laminar shear failure occurs.
At present, the interlaminar shear strength index that adopts evaluates road surface interlayer cementing performance more, namely evaluates bonding layer material type, consumption, conditioned time and tack coat road table-like condition to the impact of Interlaminar shear strengths by measuring interlaminar shear strength.Shear resistance generally by applying staight scissors power or moment of torsion on composite samples, and when destroying with test specimen, in unit area, maximum staight scissors power or peak torque calculate acquisition.Be with the defect that interlaminar shear strength is unique evaluation index, tack coat destructive process is not inconsistent with tack coat Fatigue Failure Process under vehicle horizontal loads in road surface in practice on the one hand; On the other hand, due to the viscoelasticity of asphalt material, in the loading interval of cyclic load, bonding layer material can dissipate the shear stress that accumulates on interlayer shear face repair portion of material damage, and under dull load mode, bonding layer material cannot dissipate and accumulate on the shear stress of interlayer, thus cannot reflect the shear behavior of bonding layer material comprehensively; In addition, to take interlaminar shear strength as the result of single evaluation index be covets the bonding layer material that high strength adopts viscosity too high, and antifatigue cutting performance finally may be caused to decline.Therefore be that evaluation index had both failed to reflect that the mechanical behavior of bonding layer material under Fatigue Load also fails to disclose the anti-shearing failure mechanism of tack coat with shear resistance.
As can be seen here, the above-mentioned existing test method being evaluation index with single shear resistance cannot be used for evaluating bonding layer material antifatigue cutting performance, and is urgently further improved.Solving existing test method in the defect evaluating the tired testing shear performance method of the anti-interlayer of bonding layer material, is obviously the anxious problem for solving of relevant dealer.
Summary of the invention
For above-mentioned defect or deficiency, the purpose of this utility model is to provide antifatigue shearing performance test device between a kind of bituminous pavement tack coat, the shear stress dissipation capability of test road surface tack coat.
For reaching above object, the technical solution of the utility model is:
Comprise: environmental cabinet and the tensile loads system be arranged in environmental cabinet, tensile loads system comprises and is fixedly installed on pedestal bottom environmental cabinet and tensile loads axle, the upper end of pedestal is provided with the first fixture, the output terminal of tensile loads axle is connected with the second fixture, first fixture is connected with on the first pull bar second fixture and is connected with the second pull bar, first pull bar and the second pull bar, through the center of test specimen to be measured, test specimen to be measured are provided with Light deformation measuring instrument.
The two ends of described first pull bar are provided with head rod, and the first extension bar is fixed on the first fixture, and the two ends of the second pull bar are provided with the second connecting link, and the second connecting link is fixed on the second fixture.
Described tensile loads axle is connected with the transmission rod with base parallel, the two ends of transmission rod are symmetrically arranged with the connecting link be connected with the second fixture.
The surface of contact of described first fixture and the second fixture and test specimen to be measured is cancave cambered surface.
Described tensile loads system is MTS Based on Electro-hydraulic Loading Servo System.
Compared with prior art, the beneficial effects of the utility model are:
The utility model provides antifatigue shearing performance test device between a kind of bituminous pavement tack coat, owing to being provided with environmental cabinet, test block can be treated and carry out thermostatic control, simulate road surface tack coat working condition at a certain temperature, in addition, owing to applying pulling force by tensile loading device to the pull bar through test specimen to be measured, make to reflect intuitively under shear load effect, bonding layer material shear stress dissipation capability, and then can be used in evaluating the type of bonding layer material and consumption thereof to the impact of anti-shear performance, make, for choose reasonable tack coat, there is directive significance, further, in the utility model, device also has structure simply, easy to operate feature.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present utility model;
The structural representation of Fig. 2 to be of the present utility model be test specimen to be measured.
In figure, 1 is environmental cabinet, 2 is tensile loads axle, 3 is pedestal, 4 is connecting link, 5-2 is the first fixture, 5-2 is the second fixture, 6 is symmetric form composite samples, 6-1 is the first reinforcing metal layer, 6-2 is the first overlying roaduay surface layer, 6-3 is the first underpavement layer, 6-4 is the second underpavement layer 6-4, 6-5 is the second overlying roaduay surface layer, 6-6 is the second reinforcing metal layer, 6-31 is left first underpavement layer, 6-32 is right first underpavement layer, 6-41 is left second underpavement layer, 6-42 is right second underpavement layer, 7-1 is the first pull bar, 7-2 is the second pull bar, 8-1 is the first extension bar, 8-2 is the second connecting link, 9 concentrate hole for stress, 10 is baffle plate, 11 is transmission rod.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 1, the utility model provides antifatigue shearing performance test device between a kind of bituminous pavement tack coat, comprise: environmental cabinet 1, and the tensile loads system be arranged in environmental cabinet, tensile loads system comprises the pedestal 3 be fixedly installed on bottom environmental cabinet 1, and tensile loads axle 2, pedestal 3 is provided with the first fixture 5-1, the output terminal of tensile loads axle 2 is connected with the second fixture 5-2, first fixture 5-1 is connected with the first pull bar 7-1, second fixture 5-2 is connected with the second pull bar 7-2, first pull bar 7-1 and the second pull bar 7-2 is through the center of test specimen 6 to be measured, the two ends of described first pull bar 7-1 are provided with head rod 8-1, first extension bar 8-1 is fixed on the first fixture 5-1, the two ends of the second pull bar 7-2 are provided with the second connecting link 8-2, second connecting link 8-2 is fixed on the second fixture 5-2.
In the utility model, tensile loads axle 2 is connected with the transmission rod 11 with base parallel, the two ends of transmission rod are symmetrically arranged with the connecting link 4 be connected with the second fixture 5-2, and described pulling force charger is MTS Based on Electro-hydraulic Loading Servo System.
Described first fixture 5-1 has the inner concave arc surface adapted with the bottom surface radian of shaping composite samples, and described second fixture 5-2 has the inner concave arc surface adapted with the end face radian of shaping composite samples.
The course of work of the present utility model is:
As shown in Figure 2, concentrate in hole 11 along the symmetric form composite samples 6 radial direction stress offered for placing load, described symmetric form composite samples 6 comprises the first overlying roaduay surface layer 6-2 from top to bottom successively, first underpavement layer 6-3, second underpavement layer 6-4, and the second overlying roaduay surface layer 6-5, wherein, baffle plate 10 is provided with in first underpavement layer 6-3 and the second underpavement layer 6-4, first underpavement layer 6-3 and the second underpavement layer 6-4 is divided into a left side by baffle plate 10, right first underpavement layer 6-3 and a left side, right second underpavement layer 6-4, stress concentrates hole 11 along baffle plate 10 length direction through baffle plate 10.
Concrete, symmetric form composite samples 6 is prepared by following steps:
1.1, prepare and intensively join gyratory compaction test specimen;
Roll dense bitumen compound with SHRP gyratory compaction equipment, wherein aggregate is 4500 grams, bitumen content is 4.8%.Shaping rear test specimen voidage is 4%, is highly 110mm, diameter 150 mm.
1.2, intensive gyratory compaction test specimen of joining circumferentially is divided into first, second and intensively joins gyratory compaction test specimen, form the first tangent plane and the second tangent plane, and respectively first, second intensive gyratory compaction test specimen of joining radially is divided into and left and rightly intensively joins gyratory compaction test specimen, formed first left, first right intensive join gyratory compaction test specimen and second left, second rightly intensively join gyratory compaction test specimen;
First, intensive gyratory compaction test specimen of joining is divided into two, forms first, second and intensively join gyratory compaction test specimen; Then, be the saw of 1.41mm by thickness, respectively first, second intensive gyratory compaction test specimen of joining be divided into two halves, formation first is left, first right side is intensive joins gyratory compaction test specimen.
1.3, first left, first right intensive join place baffle plate 10 in the middle of gyratory compaction test specimen after, first left side, the first right intensive gyratory compaction test specimen of joining are fixed together, form the first underpavement test specimen, the method for making of the second underpavement test specimen is identical with the first underpavement test specimen;
First left, first rightly intensive joining in gyratory compaction test specimen put into the plastic plate (PTFE-Virgin Sheet) that thickness is 1.5875mm, then respectively first left, the first right intensive gyratory compaction test specimen of joining are fixed as one overall with annular iron hoop again.Evenly apply without wheelmark sticking layer oil and polymer modification sticking layer oil on the surface of newly cutting of underpavement 6-3 and underpavement 6-4, its consumption is 1.35 L/m2.
1.4, on the first tangent plane and the second tangent plane, evenly apply bonding layer material, then the loose upper strata ground surface material that mixes of compacting, forms two composite samples; Bonding layer material can be sticking layer oil, and evenly apply without wheelmark sticking layer oil and polymer modification sticking layer oil newly cutting surface, its consumption is 1.35 L/m2.
1.5, after treating test specimen drying, first, second underpavement end of composite samples is bonded together, forms the symmetric form composite samples 6 of symmetric form.
The first underpavement test specimen after applying sticking layer oil is reapposed gyratory compaction mould bottom be reentered in compaction tool, and roll close-graded grating asphalt i.e. the first road surface, upper strata 6-2 thereon.The height rolling rear dense bitumen compound first upper strata road surface 6-2 is 25.4mm, forms composite samples.
The second underpavement 6-4 after applying sticking layer oil is reentered into compaction tool from gyratory compaction mould bottom, and rolls dense bitumen compound i.e. the second road surface, upper strata 6-5 formation composite samples thereon.The height rolling rear dense bitumen compound second upper strata road surface 6-5 is 25.4mm, forms composite samples.
Finally, cut along composite samples along being parallel to diametric(al) to composite samples, after cutting, thickness is 38.1mm.And along short transverse, this composite samples is cut, the height on the underpavement after cutting and road surface, upper strata is respectively 25.4mm and 12.5mm.Another composite samples cuts with aforesaid way.
After these two composite samples dryings, adopt epoxy resin and LOCTITE Hysol Product E-20HP by above-mentioned, finally, gained two composite samples bond along underpavement surface, and at upper strata road surface binding metal aluminium block, form the shaping composite samples 6 of new symmetric form, this shaping composite samples 6 is by the second reinforcing metal layer 6-6 from bottom to top from top layer, second road surface, upper strata 6-5, second underpavement 6-4, first underpavement 6-3, the first road surface, upper strata 6-2, the first reinforcing metal layer 6-1 forms.
Adopt drill bit at this symmetrical molding composite samples 6 centre of surface, along perpendicular to thickness direction, drilling through external diameter is that the stress of 19.05mm concentrates hole.
It should be noted that, to the composite samples that scene brill core gained is made up of wearing course and structural sheet, cut along being parallel to diametric(al) composite samples, after cutting, thickness is 38.1mm.And along short transverse, this composite samples is cut, the height on the lower floor after cutting and road surface, upper strata is respectively 25.4mm and 12.5mm.After these two composite samples dryings, adopt epoxy resin and these two composite samples of LOCTITE Hysol Product E-20HP to bond along underpavement surface, form the shaping composite samples of new symmetric form.
2), distortion gauge is installed:
Left and right first underpavement layer 6-3 and left and right second underpavement layer 6-4 install deformeter;
3), load is loaded:
Concentrate in hole 11 at stress and be placed with for the first pull bar 7-1 of left first underpavement layer 6-31 and left second underpavement layer 6-41 load application and the second pull bar 7-2 to right first underpavement layer 6-32 and right second underpavement layer 6-42, applied the fixed cycles load of 45-65N by the first pull bar 7-1 and the second pull bar 7-2;
This shaping composite samples is put into this device and the fixed load applying 45-65N on this shaping composite samples to ensure the good contact between this symmetric form composite samples 6 and this device;
On this symmetric form composite samples 6, applying the cyclic load cycle is again 1 second, comprises 0.1 second semisinusoidal type and loads and within 0.9 second, have a rest half.
4), data are recorded:
The distortion observed by deformation measurement instrument undergo mutation or experimenter whenever necessary, namely test operation person gathers the test figures of multiple circulation, and the test figure of collection comprises the total deformation in deformation measurement instrument data, time, load, test;
The distortion observed by deformation measurement instrument undergo mutation or experimenter whenever necessary, test operation person namely record 6 circulation test figures, the time span of each circulation is 1 second, altogether gather 500 data points; The data gathered comprise the total deformation in deformation measurement instrument data, time, load, test;
5), to the process data collected carry out data processing, obtain the antifatigue cutting performance of symmetric form composite samples.
Claims (5)
1. antifatigue shearing performance test device between a bituminous pavement tack coat, it is characterized in that, comprise: environmental cabinet (1), and the tensile loads system be arranged in environmental cabinet, tensile loads system comprises the pedestal (3) being fixedly installed on environmental cabinet (1) bottom, and tensile loads axle (2), the upper end of pedestal (3) is provided with the first fixture (5-1), the output terminal of tensile loads axle (2) is connected with the second fixture (5-2), first fixture (5-1) is connected with the first pull bar (7-1), second fixture (5-2) is connected with the second pull bar (7-2), first pull bar (7-1) and the center of the second pull bar (7-2) through test specimen to be measured (6), (6) are provided with Light deformation measuring instrument with test specimen to be measured.
2. antifatigue shearing performance test device between bituminous pavement tack coat according to claim 1, it is characterized in that, the two ends of described first pull bar (7-1) are provided with head rod (8-1), first extension bar (8-1) is fixed on the first fixture (5-1), the two ends of the second pull bar (7-2) are provided with the second connecting link (8-2), and the second connecting link (8-2) is fixed on the second fixture (5-2).
3. antifatigue shearing performance test device between bituminous pavement tack coat according to claim 1 and 2, it is characterized in that, described tensile loads axle (2) is connected with the transmission rod (11) parallel with pedestal (3), and the two ends of transmission rod are symmetrically arranged with the connecting link (4) be connected with the second fixture (5-2).
4. antifatigue shearing performance test device between bituminous pavement tack coat according to claim 1, it is characterized in that, described first fixture (5-1) and the second fixture (5-2) are cancave cambered surface with the surface of contact of test specimen to be measured (6).
5. between the bituminous pavement tack coat according to claim 1 or 4, antifatigue shearing performance test device, is characterized in that, described tensile loads system is MTS Based on Electro-hydraulic Loading Servo System.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320793201.2U CN204044001U (en) | 2013-12-04 | 2013-12-04 | Antifatigue shearing performance test device between a kind of bituminous pavement tack coat |
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| CN201320793201.2U CN204044001U (en) | 2013-12-04 | 2013-12-04 | Antifatigue shearing performance test device between a kind of bituminous pavement tack coat |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644759A (en) * | 2016-12-02 | 2017-05-10 | 长安大学 | Shear fatigue test method for steel bridge asphalt pavement |
| CN109580479A (en) * | 2018-12-03 | 2019-04-05 | 沈振宗 | A kind of experimental rig measuring asphalt roads inter-layer bonding force |
| CN111175111A (en) * | 2020-03-02 | 2020-05-19 | 湘潭大学 | Asphalt concrete contact test piece, manufacturing method thereof and clamp for shear test of asphalt concrete contact test piece |
| CN112684157A (en) * | 2020-11-30 | 2021-04-20 | 重庆大学 | Asphalt pavement adhesive layer performance testing device |
-
2013
- 2013-12-04 CN CN201320793201.2U patent/CN204044001U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644759A (en) * | 2016-12-02 | 2017-05-10 | 长安大学 | Shear fatigue test method for steel bridge asphalt pavement |
| CN109580479A (en) * | 2018-12-03 | 2019-04-05 | 沈振宗 | A kind of experimental rig measuring asphalt roads inter-layer bonding force |
| CN109580479B (en) * | 2018-12-03 | 2021-04-27 | 沈振宗 | Test device for measuring bonding force between asphalt road layers |
| CN111175111A (en) * | 2020-03-02 | 2020-05-19 | 湘潭大学 | Asphalt concrete contact test piece, manufacturing method thereof and clamp for shear test of asphalt concrete contact test piece |
| CN112684157A (en) * | 2020-11-30 | 2021-04-20 | 重庆大学 | Asphalt pavement adhesive layer performance testing device |
| CN112684157B (en) * | 2020-11-30 | 2023-09-22 | 重庆大学 | Asphalt pavement adhesive layer performance testing device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20161204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |